3-NAZORAT ISHI Yozma ish 1-qator 1.Sinf xonasining o’lchamlari eni 8m ,bo’yi 12m va balandligi 3m ga teng.Agar havoning zichligi 1,29,kg/m3 bo’lsa honadagi xavoning massasini hisoblang 2.Massasi 45 kg bo’lgan jism yerdan ko’tarilayotib ,3 m/s tezlanis oldi.Jismning og’irlik kuchini va og’irligini toping. 3.Yerdan 10000 m balandlikda 900 km/soat tezlik bilan uchib ketayotgan samolyotning to’liq energiyasini toping. Samolyot massasi 30000 kg. 2-qator 1.Hajmi 2 litr bo’lgan idishga qancha o’simlik yig’i sigadi. 2.Massasi 10 gr bo’lgan yaproq daraxtdan uzilib,0,3 m/s tezlanish bilan yerga tushmoqda.Yaproqning og’irlik kuchini va og’irligini toping. 3.Daraxtning shohida o’tirgan ,massasi 5 kg bo’lgan burgutning potensial energiyasi 0,4 kj bo’lsa,u qanday balandlikda turibdi? ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
